Set of rings



FIG. 1 is a front left perspective view of a set of rings.

FIG. 2 is a front view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a right view thereof.

FIG. 5 is a left view thereof.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a back view thereof.

Broken lines in the drawings show environmental structure that forms no part of the claimed design. 

CLAIM The ornamental design for a set of rings, as shown and described. 